“…Although there is considerable information on the pharmacokinetics of these antibiotics in domestic animals born and reared in the temperate zones (Pilloud, 1973;Haddad et al, 1985;Haddad et al, 1986;Brown & Riviere, 1991), there seems to be comparatively limited data in animals born and reared under tropical conditions (El Baumy & Hassan, 1986;Nawaz & Khan, 1991). Sheep and goats have shown some variations in the disposition kinetics and dosage regimens of certain drugs (Nawaz, 1982;Nawaz & Khan, 1991). Therefore the aim of the present work was to compare the pharmacokinetics of ampicillin trihydrate, gentamicin sulphate and oxytetracycline hydrochloride, given intravenously, in Nubian goats and desert sheep.…”